Orbitals and Configurations

    1) Which of the following atoms or ions does not have an electron configuration of [He]2s²2p⁶?

(a) C

(b) F^-

(c) Na⁺

(d) Ne

(e) O^2-

 

    2) Which of the following statements about orbitals in multi-electron atoms is correct?

(a) In the ground state of an atom all of the electrons will be in s orbitals.

(b) All electrons in s orbitals will have the same energy.

(c) The energy of an electron depends upon where it is located within an orbital.

(d) The energy of an electron depends upon the principal quantum number and the type of orbital.

    3) Which of the following atoms or ions does not have an electron configuration of [Ne]3s²3p⁶?

(a) Ca²⁺

(b) Ar

(c) K+

(d) Cl

(e) S^2-

 

    4) Which of the following statements about orbitals in multi-electron atoms is correct?

(a) All electrons in s orbitals will have the same energy.

(b) The energies of all orbitals with the same principal quantum number are the same.

(c) The energy of a subshell determines the energy of orbitals within that subshell.

(d) In a shell with a given principal quantum number n, the maximum possible number of electrons that can be accommodated is n².

    5) Which of the following atoms or ions does not have an electron configuration of [Ar]4s²3d¹⁰4p⁶?

(a) Br^-

(b) Cr²⁺

(c) Sr²⁺

(d) Kr

(e) Y³⁺

 

    6) Which of the following statements about orbitals in multi-electron atoms is incorrect?

(a) In the same sublevel, the five different d orbitals all have the same energy.

(b) The energies of all orbitals with the same principal quantum number are the same.

(c) The energy of an electron depends upon the principal quantum number and the type of orbital it occupies.

(d) In a shell with a given principal quantum number n, there are n different types of orbitals.

 

    7) Which of the following atoms or ions does not have an electron configuration of [Ar]4s²3d¹⁰4p⁶?

(a) As^3-

(b) Kr

(c) Rb⁺

(d) Xe

(e) Se^2-

 

    8) Which of the following statements about orbitals in multi-electron atoms is incorrect?

(a) In a principal energy level with a given principal quantum number n, the five different d orbitals all have the same energy.

(b) The size of the s orbital increases with an increase in the principal quantum number.

(c) The energy of an electron depends upon the principal quantum number and the type of orbital it occupies.

(d) In a principal energy level with a given principal quantum number n, there are n² different types of orbitals.

 

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